Carbon ceramic nanoparticulate film electrode prepared from oppositely charged particles by layer-by-layer approach

Abstract

Carbon ceramic nanoparticulate film electrode was prepared of negatively charged sulfonated carbon nanoparticles and positively charged silicate submicrometre particles with appended imidazolium groups. They were immobilised on indium tin oxide surface by layer by layer method: alternative immersion into suspension of positive and negative particles. Film formation is confirmed by scanning electron microscopyafter larger number of immersion and withdrawal steps more material is deposited on the electrode substrate. The nanoparticulate film is stable and the obtained electrode exhibits significant increase of capacitive current and faradaic current corresponding to hydrogen peroxide electroreduction. The effect of the number of immersion and withdrawal steps is strikingly visible on dioxygen bioelectrocatalytic reduction current after adsorption of enzyme: laccase.

A review on electrodes modified with ionic liquids

“…Due to their imidazolium functional groups, this electrode acts as a reversible sponge for electroactive anions. These silicate particles can be used as a linker for immobilization of carbon nanoparticles with anionic functionalities using layer-by-layer procedure [315]. After further modification with laccase, this electrode exhibits bioelectrocatalytic dioxygen reduction [315].…”

(Bio)electroanalytical Applications of Carbon Nanoparticles

“…It was also demonstrated that with LbL approach one can prepare conductive films combining negatively charged conductive CNPs and isolating functionalized silicate submicroparticles 36, 45, 46. This indicates that percolation paths of CNPs are formed instead of well defined separate layers of different types of particles, because of the dense coverage of silicate submicroparticles with oppositely charged CNPs (Fig.…”

“…The films of various types of carbon nanoparticles have also been applied as a platform for immobilizing bacteria 63–65 64–66 and enzymes as glucose oxidase (HRP) 39, 46, 66 21, 41, 48, 78, hydrogenase 42, ethanol dehydrogenase 49, horseradish peroxidase 48, 78. These bioanodes are capable for oxidation of such fuels as glucose 21, 28, 48, 78, hydrogen 42, acetate 66 or ethanol 49.…”

Methomyl Detection by Inhibition of Laccase Using a Carbon Ceramic Biosensor

“…As previously reported in the literature, laccase can be immobilized on the surface of a CCE and successfully employed for amperometric determination of a variety of phenolic substrates [10] and also in the study of bioelectrocatalytic dioxygen reduction [11][12][13][14].…”